diehlmao



(No Model.) v

0. F. DIEHLMANN.

BOLT.

No. 316,760. Patented Apr. 28, 1885.

WITNESSES: I INVENTOR W. BY

Fa g 4Z ATTORNEYS UNITED STATES PATENT OFFIC CARL F. DIEHLMANN, OFBROOKLYN, NEW YORK.

BOLT.

SPECIFICATION forming part of Letters Patent No. 316,760, dated April28, 1885.

Application filed October 29, 1884. (No model.)

To all whom it may concern:

Be it known that I, CARL FRIEDRICH DIEHL- MANN, of Brooklyn, county ofKings, and State of New York, have invented certain new and usefulImprovements in Door-Bolts, of which the following is a specification.

This invention has reference to an improved sliding door-bolt of cheapand simple construction which is opened or closed from the inside in theusual manner and from the outside by means of a key.

In the accompanying drawings, Figure 1 represents a side elevation of myimproved door-bolt shown in locked position. Fig. 2 is a horizontalsection of the same. Fig. 3 is a detail rear View of the slide-bolt withthe keepersin section.

Similar letters of reference indicate corresponding parts.

A in the drawings represents the supportingplate of my improveddoor-bolt, which is at r ached to the door by screws or otherwise. Thesup'portingplate Ais provided with keepers a a, that guide theslide-bolt B,which takes into a keeper, b, of the door-casing when thedooris closed. The rear side ofthe bolt B,which faces the plate A, has arecess, d,which is engaged by an oscillating arm, 0, that is pivoted tothe plateA, the pivot ebeing extended into a key-hole, e, of suitablesize, bored through the door. The pivot e is made of such a shape as tobe engaged by a key, D, having a barrel of corresponding shapes, asshown in Fig. 2.

The shape of the pivot and the corresponding The bolt cannot be openedfrom the outside except by a key fitting it. The key-hole e is providedwith an escutcheon, e. The slide- .bolt Bis taken hold of at the insideby a small knob, f, attached to the bolt for being thrown into open orclosed position. The bolt B is operated from the outside by the key Dand the arm (J ,which engages the recess of the bolt. In applying thebolt to the door, all that is required is to bore the key-hole e andthen screw the supporting-plate A, keeper 1), and escutcheon e intotheir proper positions. In this manner a cheap and simple door-bolt isobtained that can be quickly applied to thr door, and which can be usedin place of tl expensive door-bolts heretofore in use.

Having thus described myinvention, I clain as new and desire to secureby Letters Patcnt- The combination of a supporting-plate havin g angularkeepers, a square slide-bolt adapted to slide in said keepers, providedwith a knob on its outer face and with a recess on its inner facebetween said keepers, an oscillat ing arm pivoted to said plate andextending through said recess, the pivot of said arm being extended intoa key-hole on the opposite side of the door, substantially as described.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

CARL F. DIEHLMANN.

Witnesses:

PAUL GoEPEL, SIDNEY MANN.

